blob: 854528690a4a8f7196cffd9eb2ac35c101c62d73 (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
|
/*******************************************************************************
* Copyright (c) 2007, 2010 Oracle. All rights reserved.
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v1.0, which accompanies this distribution
* and is available at http://www.eclipse.org/legal/epl-v10.html.
*
* Contributors:
* Oracle - initial API and implementation
******************************************************************************/
package org.eclipse.jpt.common.utility.internal.model.value;
import java.util.Arrays;
import java.util.Iterator;
import org.eclipse.jpt.common.utility.internal.ArrayTools;
import org.eclipse.jpt.common.utility.internal.iterators.ArrayIterator;
import org.eclipse.jpt.common.utility.internal.model.AbstractModel;
import org.eclipse.jpt.common.utility.model.value.CollectionValueModel;
/**
* Implementation of {@link CollectionValueModel} that can be used for
* returning an iterator on a static collection, but still allows listeners to be added.
* Listeners will <em>never</em> be notified of any changes, because there should be none.
*/
public class StaticCollectionValueModel<E>
extends AbstractModel
implements CollectionValueModel<E>
{
/** The elements. */
protected final Object[] elements;
private static final long serialVersionUID = 1L;
/**
* Construct a static collection value model for the specified array.
*/
public StaticCollectionValueModel(E... elements) {
super();
this.elements = elements.clone();
}
/**
* Construct a static collection value model for the specified elements.
*/
public StaticCollectionValueModel(Iterable<? extends E> elements) {
super();
this.elements = ArrayTools.array(elements);
}
// ********** CollectionValueModel implementation **********
public int size() {
return this.elements.length;
}
@SuppressWarnings("unchecked")
public Iterator<E> iterator() {
// we can cast here since our constructors require the elements to be
// of type E and ArrayIterator is read-only
return (Iterator<E>) new ArrayIterator<Object>(this.elements);
}
// ********** Object overrides **********
@Override
public void toString(StringBuilder sb) {
sb.append(Arrays.toString(this.elements));
}
}
|
